Dear Admin,
Please close this question as it has been solved by myself.
The problem is, I have missed some ISAKMP policy of the new VPN remote access. After adding a new group policy over an existing one, it works fine.
>>>>>>>>> the following commands also set>>>>>>>>>>>>>>>>>>>>>>
crypto dynamic-map VPNCLIENT-MAP 65535 set transform-set ESP-3DES-SHA
crypto dynamic-map VPNCLIENT-MAP 65535 set security-association lifetime seconds 288000
crypto map outside_map 65535 ipsec-isakmp dynamic VPNCLIENT-MAP
>>>>>>>>>previous group policy>>>>>>>>>>>>>
crypto map outside_map interface outside
crypto isakmp identity address
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 5
lifetime 86400
>>>>> the following is the new group policy that has been added>>>>>>>>>>>
crypto isakmp policy 65535
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400