Cisco ASA Site-to-Site VPN with Dynamic Peer

Ok so we have  an ASA that we use for 20 or so VPN sites, and when there is a static IP at the  other end all is well. But in order to save some $$ we have a new site that wants to use a dynamic address.

From reading I should be able to setup a dynamic crypto map. I use ASDM exclusively, so try to keep the CLI to a minimum. I went in to ASDM and created a new entry. Below is the warning I get.

[OK] access-list outside_cryptomap_8 line 1 extended permit ip 192.168.0.0 255.255.254.0 object VPN-KERMIT 
[WARNING] tunnel-group KermitDynamic type ipsec-l2l
	 L2L tunnel-groups that have names which are not an IP
address may only be used if the tunnel authentication
method is Digital Certificates and/or The peer is 
configured to use Aggressive Mode

[OK] tunnel-group KermitDynamic ipsec-attributes
      tunnel-group KermitDynamic ipsec-attributes
[OK] ikev1 pre-shared-key **********
[OK] isakmp keepalive threshold 10 retry 2
[OK] crypto dynamic-map KermitDynamic 8 match address outside_cryptomap_8
[OK] crypto dynamic-map KermitDynamic 8 set  pfs group1
[OK] crypto dynamic-map KermitDynamic 8 set  ikev1 transform-set  ESP-3DES-SHA
[OK] crypto map forsberg 8 ipsec-isakmp dynamic KermitDynamic

Select allOpen in new window

So from reading the warning it looks like the dynamic peer needs to be using Aggressive, and it is. However,what group should it be using, usually in ASDM on a staic map I can set the mode (aggressive/main) and the group (group 1, 2, ...). However on ASDM I don't get those options at all.

I cannot get the tunnel to come up. The dynamic peer log shows, Aggressive mode started...Initiate new phase 1 negotiation...IPsec SA request queued due to no phase 1 found.

Any thoughts?