Wireless internet connection via mobile phone - Help!

[SJJ]

I have a wireless internet connection which I have no problems with... the problem comes when I try to use it to connect to the internet via my new mobile phone.
The phone says 'select connection', one of the options is 'Seach for WLAN'
My wireless connection network is listed but I can't connect because I don't know the pre-shared key for WLAN.
Where would I find this?

Thank you in advance for your help :)

[ChuckFickens]

Might be on a sticker on your router if you're lucky, otherwise you'll need to log into the admin page for your router and find it in the wireless security settings page.

If you are going to ask how to do that then please post make and model of router.

[SJJ]

Thanks ChuckFickens
There is a sticker on the router but there are lots of different codes - not sure which one it would be.
The router is a Belkin G Wireless Router - F5D7234-4V3

[ChuckFickens]

Assuming you are connected through the router now click the link below

http://192.168.2.1

Once the routers admin page has loaded click on wireless > security on the left and you should be able to see your network key on that page.

[SJJ]

It worked, thanks for your help ChuckFickens!