Unresponsibe View Keys??

ok so ive finally got some will and learned how to use blender today, and everything was working fine with the help a tutorial videos…

but by tonight the view key 1,3,7 are not working properly; 1 and 3 are completely unresponsive but 7 will give me a top view (tho off center). did i change something on accident? this has really made things difficult, please help:confused:

Sounds like you turned off Num Lock