Extensions not working

Discussion created by waderhampton on Jun 18, 2010
Latest reply on Jun 18, 2010 by kenbuja
I have the Spatial Analyst and the Military Analyst installed with Arcview 9.2.  Both had previously worked, but have now stopped working.  I can select the options from the toolbox, but the toolbox form that opens is blank white.  ANy suggestions on what the problem may be?  I have made sure the extensions are checked under Tools\Extensions.  Thanks.