When I configuring my BizTalk Server 2006 on WinXP Professional I am facing another problem with the following long text.
Exception:
You cannot request an Install, delete or change credentials operation on this Biztalk Host instance because it is currently running. You must stop the BizTalk host Instance before trying it again.
Fig. 1 BizTalk In-Process Host BizTalkServerApplication Group.
Solution:
One of the simplest solution of this problem is to stop BizTalk Server Application Service from Services Management Console and again apply configuration this time you don't get any exception.