Thank you for your reply
All security settings are ok ,this happens on all computers .I have tried the file on 4 different ones with different versions of IE.The View pdf in browser is enabled on all machines, as well as in acrobat.I also tried this link and tested the acrobat file it loads ok in IE http://windowsxp.mvps.org/ie/pdf.htm.I am trying this offline before I upload to server.
Reg Peter