Problem with Incredimail backup installation

Hello all,
I am facing a problem in the incredimail backup installation. I am currently using OS windows 7 ultimate sp1 and my internet browser is Firefox 2. I am using version 2 of incredimail.
When I start the backup installation, I get an error.
The screenshot of the error is as follows:
The message in English is written below:
- IncrediBackup_ Installer.exe Error de application Mistake
La instruction on 0x00478500 hace reference to the memory in 0x6b636150, the memory can be Read.
I have not changed anything in my system recently so why am I getting this error? Does anyone have idea how to solve the problem?
I am anxiously waiting for your ideas.
Thanks in advance.
John
