I am using MSMQ for a general TCP Listener. The queue works fine, but sometimes, while I am parsing through the queue and getting messages out of it, I get the following exception:

Exception in server System.Messaging.MessageQueueException (0x80004005) at System.Messaging.MessageQueue.SetPermissions(AccessControlList dacl) at System.Messaging.MessageQueue.SetPermissions(String user, MessageQueueAccessRights rights, AccessControlEntryType entryType) at M2MParser.StartParser.Server(Boolean flag) in StartParser.cs:line 49 

Line 49 has the following line of code

mqueue.SetPermissions(Environment.UserName, MessageQueueAccessRights.FullControl, AccessControlEntryType.Set); 

I have searched a lot for a solution to this exception but to no avail. If I restart the program, it starts working fine again, no exceptions.

Any help on this exception or why it occurs is appreciated.