windows 7 could not connect xp

in 7, can see xp, but when click to get in, asked to id and password. try both pc id and passwrd and failed. troubleshooter says "no permission", but username and password entered correctly. windows 7 and xp are in the same workgroup.

dialog box always shows "win7\xp" and invalid password. "win7" is the windows 7 computer name and "xp" is windows xp computer name. it seems that xp is under windows 7. but it's workgroup. confused?


in xp, can get the shared folder in 7. so it's one way.

any fix?