strange problet with 3crew100-75

[Websghost]

i have a cable modem at home , and i have a 3crwer100-75, installed.



when i was connected throe a DSL company with a PPPOE connection the router worked perfectly



I changed the apartment and I needed to change my internet connection , so I was connected throe



the cable company in a L2TP connection , but now the router is disconnecting about every 5 -10 mints , I called the 3com support center



And the send me a new router , but it didn’t help me at all , I upgraded the firmware , and it steel the same.



By the way I tried to connect throe PPTP to , but it's the same problem , is there anybody that was able to solve this issue



I will happy to hear about it.