ASP Refresh Debug Assistance

I am having a problem which thus far only seems to be fixed when I refresh the page. The basic process is as folllows:

1. Select details from the DB and display on screen.

2. Click a link 'Generate Docs'.

3. This then goes to a page which first selects from the DB using information passed through the URL from the above link to identify the correct records. We then create a PDF file based on the data from the DB and display the link to the newly created PDF. The problem, is that at step 3 the PDF does not get generated on the first pass, only if you click the refresh button on the browser.

I have checked all the obvious items, ensuring variables are assigned correctly and called correctly, I have tried implementing a number of 'must revalidate' style tags in both ASP and HTML, I have checked through all of the queries to ensure they are being processed and the data is returned on the first pass and they are and nothing thus far has worked.