Try checking your display properties, resolution and colors.

Felix.

Try checking your event viewer: application and system logs.

Felix.

Anytime your get an unauthorized error, you need to re-check the Security Tab for the application pool that works with your RS site.

Felix.

You have to define your users or Groups on Active Directory, then using internal RS security tab you can define first: profiles and after users that you want to include...

Try to use a domain user account with privileges for RS on the sql server and RS service pack installed.

Felix.

Thanks guys!

I tried to fix the error, but:

Detailed code below:

Public Function GetUMConnectionString() ' sample values

    GetUMConnectionString = "Provider=SQLOLEDB.1;Data Source=(local);Initial Catalog=myDB;uid=myuser;pwd=mypass;Packet Size=32767"

End Function

.... I use this function to execute...