I have manage to resolve the problem based in the solution reported by the "nat4android" user from the google support forum.
I have a Samsung Galay Tab with froyo 2.2.
First I have converted my *.cer certificate to a *.crt (You can do this from this site "https://www.sslshopper.com/ssl-converter.html")
Next you put the *.crt certificate in the root of sd card and install the certificate through the definitions of android.
After that you follow the instructions of "nat4android":
Fix #
1) Download Wifi Advanced Configurtion App and its free.
2) Add a new wifi-network as per your employer instructions. Now, you will see two "XXX" SSID one showing as "secure with WEP" and other as "not in range"
3) Open the App and uncheck the WPA_EAP setting in Key Management for the wi-fi network you created.
4) Your wireless should have already connected now.
This have worked for me and I have tried everything before this...
