Asp mysql

[elektroman]

Hi all
I have a web site on IIS and I use ASP as server side
MYSQL is the database where I store informations.
During these last days when I check log files I find a lot of errors in some pages like the following:

Number=-2146827781
"An_exception_occurred:_'rs.Open"

These errors happen when a query has to be executed, but the syntax of query is correct because when I load the pages, in which it seems to be errors, sometimes I get error and sometimes not.

I also want to inform you that these errors happen since when in the database connection string I put as ODBC driver 5.1 (which has been installed in the meantime in the server)instead of ODBC 3.51

I know that my information can be strange but can you help me?

Thanks in advance