Using forward and back buttons in Outlook Express

[Mr Joshua]

Hi all,

I usually browse through my email messages using the forward and back buttons on the side of my mouse but for some strange reason it has stopped working. I haven't changed anything recently and it only started last night.
A quick search on google hasn't turned anything up and I can't see any options in OE to assign these keys, is it possible to re-assign them?

Thank in advance.

 

[Mr Joshua]

The plot thickens.

I DLed the latest setpoint software (Logitech mx518) and it seemed to cure it, however, when I restarted the PC (as per the instructions) it stopped doing it again!