PHP, Acrobat Plugin and Browsers

Hello everybody I am facing the following problem and I would like to know if someone have faced this before: 1) I made a script to create a pdf file from a web page. The problem is that it works more or less fine with Netscape but with IE it shows loading the Acrobat Reader screen, but after nothing happens. It seems that after this happens the Acrobat Reader does not respond anymore. 2) The second problem is realated to Netscpe: It works fine 1 time but after this, the Acrobat plug in remains opened in the background of Windows 98 and when I try to load the web page for the second time the plug-in does not respond. I am using Apache Server 1.3.19 OS Windows 98 PHP 4.0.5 Pdflib "Gmbh" 3.03 (phpinfo). If someone have faced this problem please give me some hints because this is amazing... When we think that everything is fine other problems appear !!! Thank you guys !!! Renato