What is your operating system? What is your Reader version?
Can you open that PDF with a text file editor (e.g. Notepad on Windows), then copy and post the first 10 or so characters of that file?
I am on a Mac air.. OS7 I believe and I have the most rent version of Adobe Reader. Unfortunately the pdf won't open at all if saved but I have been able to open pdfs that have been emailed to me. Any ideas??