pbdo bot error

pls help me :
Bug report generated on the 27.03.2013 at 07:13 o'clock (local time)

Bot Client: v.1.3.7.63
Operating System: Microsoft Windows 7 Professional
Language: de-DE
Process runtime: 0:0:27
work dir: D:\PBDO-Bot_v_1_3_7_63_FULL_STARTER_PACKAGE

Exception Stack:

Code:

System.NullReferenceException: Object reference not set to an instance of an object.
   at ..()
   at ..()

Previous debug log:

Code:

07:12:56: +----- short sys info [start] -----+
07:12:56:  Bot Client: v.1.3.7.63 working build: 
07:12:56:  Operating System: Microsoft Windows 7 Professional 
07:12:56:  Language: de-DE
07:12:56:  CPUs: 4
07:12:56:  work dir: D:\PBDO-Bot_v_1_3_7_63_FULL_STARTER_PACKAGE
07:12:56:  machine name: DELL2011-10
07:12:56:  uptime: 13 min.
07:12:56:  system date: Mittwoch, 27. M�rz 2013
07:12:56: +----- short sys info [end] -----+
07:12:56: loaded account & program settings.
07:12:57: 1,99 seconds start up duration.
07:12:57: root backgroundworker started.
07:12:57: running on the newest bot client version.
07:12:59: received all needed game data.
07:13:22: Critical error in bot session account0, the session has to be terminated!
 Error: System.NullReferenceException: Object reference not set to an instance of an object.
   at ..()
   at ..()

Previous standard log:

Code:

07:12:56: Welcome, klopio8.
07:12:57: Login request on bot authentication server started..
07:12:58: Access granted!
           ->  You logged in for the 32. time.
07:13:04: account0 establishing connection.
07:13:13: account0:de1 login successful
07:13:22:  -> account0 terminated.

Additional Informations (What were you doing at that moment?)
:horse: