Problem while configuring "BAMtools"

I am new to BizTalk team and while configuring "BAMTools" I am facing following error:

ERROR: Failed to set up BAM database(s).
Errors in the encryption library: Failed to encrypt sensitive data. Possibly the encryption key is inaccessible because of improper service account change.

Update 1: I search net and found out that I need to clean "Program Files\Microsoft SQL Server\MSSQL.3\OLAP\Data" folder in order to get rid of it.

Let me check it out.

 Update 2: Plain deleting files in \OLAP\Data didn't worked.

 Now I actually deleted database from analysis services. Let see what happen.