Applescript stopped by dialog box

Hello fellowers,

i am rather new to Applescript and to to get into it I decided to write a short script which should mount my Time Capsule folder and send a message to Growl. Working fine so far, but if the server cannot be found a dialog box pops up stating it's not available. However this popup stops the script. I tried adding a row - keystroke return but this does not help because the script waits for the user to hit ok.

Do you know how to suppress the dialog box or a suitable workaround?

Appreciating your help,

regards from Austria,

Luke