Get A Webpage Up And Running?

I ran into an odd issue today while trying to get a web page up and running. At one point there is a sql select statement which basically selects one field from a table that has only one row of data. For some reason no rows are returned by the select statement when at the customer site from the web page.

The same select statement works on the same machine if pasted into a query window [SQL Express] and returns one row of one field as it should. The query works on my server from the same web page and also works on the other server I tested on. For some reason when ran at the customer site there is a delay of about 30 seconds and no data is returned.

There are several other queries in use at various times, same web site, same db, same server and all seem to work without issue but this one query is failing about 90% of the time, once in a while it returns a row. No errors are reported in either case. Using ADO recordset object, simple select field from table no where clause. Running under IIS7 from an ASPX file hitting a SQL Express database.