To make a screenshot bring up the screen you’re having trouble with > press and hold ALT > press “prt scr” on your keyboard > open Word Pad > select Paste > save it. OR if its more than 64kb you can just click on Reply and paste it into your message. Normally this is not done as large pasted screen shots are difficult for dial-up users to download but this may qualify as an exception to that.
Check this link: How to add a screen capture to your forum posting