I'm not really sure why that's happening, but this definitely isn't a common problem.
Here are a few questions which, answered, might help us to find the cause of this problem.
- What version of sourcemod do you use?
- Does this happen every time you load the plugin?
- Does it happen if calladmin is the only plugin loaded?
- Have you tried to restart the server?
- Can you post the output of 'sm plugins list'?
__________________