laptop wireless problem?

I have an acer aspire timelinex notebook

, I am having an issue with the wireless connection. I am broadcasting through an iMac and using WEP Security but the laptop does not ask me for any password. I have went to Control Panel and deleted all the other Profiles in the Network Section. If i take the password off and try to connect to it, it works and i can use the internet and everything but when i put the password it stops working. I have updated my Network Drives. Any help would be appreciated, and one more thing I have Comcast connected to the Imac which is broadcasting the connection.

terrelle pryor