Viewing Problem

Dear All,

In MS7.0 when I'm  trying to view the atoms as sticks or balls and sticks or CPK I can't  view it anymore. I'm wondering the reason for this problem. If you have any suggestions to improve the same please let  me know. I'm running MS in a machine with the following specifications:

MS7.0 in Windows 7 professional

Processor: Intel(R) Xenon(R) CPU E3-1240 V2 @ 3.40 GHZ

Installed Memory: 8:0 GB

System Type: 64-bit OS

Thanks very much in advance for any input.

Sincerely,

arunabhiram chutia