Mem,
A lot depends on (a) your e-mail program, (b) the kind of attachements giving problems (and the kind not giving problems) and (c) possibly on your anti-virus settings. And you don't disclose any of those factors.
So let's assume you use Outlook Express 6 and have it set to the default security setting of not opening potentially harmful attachments. That would explain a lot and, in fact, is the most common reason for this behaviour. Go and see in Tools>Options.
Hope this helps.
Kees
Hi
I am having probs opening some attachments to my incoming emails. Some attachments open no bother and with others nothing happens when I click on the line.
I have Norton and Adobe etc. What should I do?
mem

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