Problems With SP_TRACE_CREATE

Hi All,

I'm trying to create a trace on my SQL 2005 Express.

I used the following code:

DECLARE @TraceID INT
DECLARE @MaxSize bigint

SET @MaxSize = 15

EXECUTE sp_trace_create @TraceID output,
@options = 2, --//rollover the file when max size is reached
@tracefile = N'C:Documents and SettingsdmanbuhnikMy DocumentsTestTrace.trc', --//trace file name
@maxfilesize = @MaxSize --//maximum file size

SELECT @TraceID --//output the traceid create for viewing

When I run it, I keep getting an error:

Windows error occurred while running SP_TRACE_CREATE. Error = 0x80070005(error not found).
Msg 19062, Level 16, State 1, Procedure sp_trace_create, Line 1
Could not create a trace file.

Any idea what's wrong??

thanks a lot,

Yoav