Deployment error with netbeans vwp

when i try to run my vwp project i get this error.

Starting server Bundled Tomcat (5.5.17)

Starting of Tomcat failed.

D:\Documents and Settings\Erdal\erdalWEB\nbproject\build-impl.xml:475: Deployment error:

Starting of Tomcat failed.

See the server log for details.

all i do is to open a new Visual Web Application project, drag and drop a label and deploy it. nothing complicated but couldn't found where the problem is. please give me a hand, a hint, a way to get over this...

[537 byte] By [Erdal_YILMAZa] at [2007-11-27 11:57:41]