workgroup logon connection challange

I have a network with two computer but i haved a third computer i can see the three computer in the workgroup but the computer with resources will not let me log into it, it says user name and password is incorrect it will not allow me log in to it and the database is being shared via a wireless connection to the other computer. can someone please help me.

thank you

 

Try resetting your network

I've had similar problems, and have normally over come the problem by re-running the network set up wizard on all the computers, I currently run 5 over wireless, they all run as Infrastucture, plus I run any I am repairing via cable, the computers all need different names, user/machine and possibily description otherwise they will conflict. set them to run through gateway/hub if you are running DSL