Well, phase 2 policy is completely different between the 2 ends.
Assuming that crypto map 50 is assigned transform-set QWERT, the policy does not match at all.
Your end: 3DES and MD5
The peer end: 3DES, SHA1 and PFS group 2
You can create a new transform-set that has the following:
crypto ipsec transform-set 3DES-SHA esp-3des esp-sha1-hmac
Then assign this transform-set to crypto map 50:
crypto map kepp 50 set transform-set 3DES-SHA
crypto map kepp 50 set pfs group2