Ipsec can't connect android systems

[mococanet]

Dear Guys,

I have also another problem with my ipsec, i can connect vpn under my iphone, windows pc, mac mini but can't connect android systems, this error is logged:

deleting half open IKE_SA after timeout

Only is possible connect using android system when I change to main mode and leave blank the android's field 'name of group'

someone can help me please?