hashcat-gui v0.5.1 - not work perfectly

[macgyver]

This is not a gui thread, so i move it to oclHashcat-plus.

You are setting an invalid mask. Read this page to understand mask attack:

http://hashcat.net/wiki/mask_attack

Thank You!

I ask you a favor because my english!
How can i run bruteforce:
- lower characters
- upper characters
- decimals

Please just give me, what write in "mask box". Thank you!