Pastel Partner version 12 error on Win XP SP2

Hi,
Recently, I have downloaded Pastel Partner version 12 on my Win XP SP2 and tried to install it but got stuck at the end of installation and faced this annoying error message. I tried to remove this program to take effect as a resolution but could not get any positive effect. I am looking for an expert’s advice resolving this issue. I am unable to understand this nonsense message so please suggest me in a proper way. I would be grateful to you. Thanks.

Pastel Partner version12
Installation error 1603. Please contact Pastel support for assistance.
