Parallels V5 - Login Window Problem

I had the Version 5 installed on a Mac Book , than installed Window XP Pro.

Everytime Login Window , it will promt to duplicate a new profile and it end with a bracket number ...like (1) and after many times of use ...the bracket become square type ... [1] .... any ideas how to resolve this login duplicate account problem ?

When check on Mac side ... all the duplication are only on One Date And at the Same Time ....so far duplicated until ...(1)(1)[8] ...really do not know what it mean.

I had another Mac Book with Parallels and without such problem.

Thanks in advance for answering.