Hello Dear
I also have this problem but i read some solutions and on progress to try it
U can try the following solution
1-U should have an UMPT working without any problems and of course u can login it
2-Login UMPT and use MML to add UMPT in slot 6
3-Install inaccessible UMPT in slot 6
4-It supposed to synchronous with working one and take the same login data
5-after 15 minutes try to access UMPT on slot6 with same username & password of UMPT in slot7
6-If it working plz confirm
Hope solving ur problem ISA