Gt06e

Hello everyone,
I need help please help me.
I have a GT06E It causes problems with parking times,
He changes parking times without moving the car.
From concox I do not get any help.
The GT06E is connected to tracksolid servers
Example,
The car parks him of reality 10 hours  At the 3 hour sometimes 5 hours the parking time catches again from 1 minute.
I have 6 piece GT06E all have this error.
This attitude I use
GMT,E,8,0#
SERVER,1,gpsdev.tracksolid.com,21100,0#
APN,web.vodafone.de#
I ask you to help me where the error is
Vilen thanks to him ahead
giobox