My internet radio can't find my network

[#1]

Switched to PlusNet recently.  PC and laptop connected wirelessly without any problems but my internet radio won't connect.  I have entered the correct WPA code but it comes up with a timed out message.
If I disable the security it connects and works fine.
I should say it worked fine with my old router from previous provider.  The manufacturer help page says that there could be a problem with the MAC address being blocked?  Is that something I can check on the router myself?
It suggests setting it up with a static IP address - it tells you how to do it but not what to put into the IP address, DNS address etc.
Anybody come across the same problem and resolved it?
Keith

[#2]

Upper case / lower case letters entered correctly ?

[#3]

Yes, all entered correctly thanks.

[#4]

What make of radio? My Roberts Stream 205 connected fine using WEP.

[#5]

Tevion 5404
Although it asks for a WPA key my previous router did use a long WEP key.  I tried switching the router to WEP and lost laptop connection and had to connect via Ethernet to change back and get onto internet again - didn't try anything else after that.

[#6]

Prompted by your comment on using WEP I have changed the encryption to WEP and restarted the radio, entered info again, and it has connected!  looks like it doesn't like WPA.
I have managed to get the wireless up and running on the laptop by changing the security type to 'shared' and putting the WEP key in.

Question now is am I OK running in this mode - the router wifi light is orange?

[#7]

Finally sorted, with thanks to tijara33.
Feeling a bit braver now I had a connection I found the 'upgrade firmware' option.  I took a deep breath when it said "ARE YOU SURE?".
t came back on after a while.  I reset the security on the router to WPA and rejigged the info on the radio - it connected using WPA this time and I've got the green light back up.
Keith