It seems a lot of people are having this problem, but none of the posted solutions have worked for me so far. My driver is installed and activated, I have tried removing and re-adding the network, and various other fixes. No networks were picked up on my first boot, the next day wireless worked fine, and since then it does not detect networks, and when I manually try to connect, it repeatedly asks for the password and does not connect. Here's my info:

03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
    Subsystem: Dell Inspiron M5010 / XPS 8300
    Flags: bus master, fast devsel, latency 0, IRQ 17
    Memory at f0500000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
    Capabilities: [58] Vendor Specific Information: Len=78 
    Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [d0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [13c] Virtual Channel
    Capabilities: [160] Device Serial Number 00-00-a1-ff-ff-f3-70-f1
    Capabilities: [16c] Power Budgeting 
    Kernel driver in use: wl
    Kernel modules: wl, bcma, brcmsmac


root@michelle-laptop:/home/michelle# ifconfig
eth0      Link encap:Ethernet  HWaddr 70:f1:a1:f3:ba:ab  
          inet6 addr: fe80::72f1:a1ff:fef3:baab/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:29
          TX packets:0 errors:30 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:17

eth1      Link encap:Ethernet  HWaddr f0:4d:a2:53:83:7a  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:43

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:104 errors:0 dropped:0 overruns:0 frame:0
          TX packets:104 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:8000 (8.0 KB)  TX bytes:8000 (8.0 KB)


root@michelle-laptop:/home/michelle# lsmod
Module                  Size  Used by
dm_crypt               22528  0
snd_hda_codec_hdmi     31775  1
snd_hda_codec_realtek   174313  1
snd_hda_intel          32765  5
snd_hda_codec         109562  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep              13276  1 snd_hda_codec
snd_pcm                80845  4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13132  0
snd_rawmidi            25424  1 snd_seq_midi
snd_seq_midi_event     14475  1 snd_seq_midi
snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event
parport_pc             32114  0
ppdev                  12849  0
binfmt_misc            17292  1
lib80211_crypt_tkip    17275  0
bnep                   17830  2
rfcomm                 38139  0
snd_timer              28931  2 snd_pcm,snd_seq
snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
joydev                 17393  0
wl                   2646601  0
snd                    62064  19 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              14635  1 snd
btusb                  17912  0
bluetooth             158438  11 bnep,rfcomm,btusb
uvcvideo               67203  0
videodev               86588  1 uvcvideo
snd_page_alloc         14108  2 snd_hda_intel,snd_pcm
lib80211               14040  2 lib80211_crypt_tkip,wl
intel_ips              17822  0
psmouse                72919  0
serio_raw              13027  0
mei                    36570  0
dell_laptop            17767  0
dell_wmi               12601  0
dcdbas                 14098  1 dell_laptop
sparse_keymap          13658  1 dell_wmi
mac_hid                13077  0
lp                     17455  0
parport                40930  3 parport_pc,ppdev,lp
usbhid                 41906  0
hid                    77367  1 usbhid
wmi                    18744  1 dell_wmi
i915                  414817  3
atl1c                  36718  0
drm_kms_helper         45466  1 i915
drm                   197692  4 i915,drm_kms_helper
i2c_algo_bit           13199  1 i915
video                  19068  1 i915
root@michelle-laptop:/home/michelle# iwlist scan
lo        Interface doesn't support scanning.

eth1      Interface doesn't support scanning.

eth0      No scan results

root@michelle-laptop:/home/michelle# rfkill list
0: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
3: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Obviously I don't know what I'm doing. I'd appreciate any help! Thanks!