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I don't understand your scenario. Can you post something more?
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I don't understand your scenario. Can you post something more?

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We decided to revert back to the older IOS. Will revisit this shortly.
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We decided to revert back to the older IOS. Will revisit this shortly.

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Ok, anything before 8.3 should be ok.
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whats happening is VPN is connected, but seems no pass through traffic is allowed...
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whats happening is VPN is connected, but seems no pass through traffic is allowed...

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That could be the access-lists that are used to match the traffic that is permitted to go through the tunnel or the lists that are used for the nat exempts (no nat) for the traffic going through the tunnel. As said before, I suspect it has to do with the latter.<br />
<br />
If possible, the easiest way might be to set up a new site2site VPN using the wizard in ASDM and be done with it.
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That could be the access-lists that are used to match the traffic that is permitted to go through the tunnel or the lists that are used for the nat exempts (no nat) for the traffic going through the tunnel. As said before, I suspect it has to do with the latter.

If possible, the easiest way might be to set up a new site2site VPN using the wizard in ASDM and be done with it.

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Using IOS 8.4(1)<br />
<br />
Was working just fine before the IOS was updated to newest 8.4(1) from 8.2(1)<br />
<br />
Connecting ASA 5520 to the ASA 5510...<br />
<br />
&nbsp;anyone else have this issue?
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Using IOS 8.4(1)

Was working just fine before the IOS was updated to newest 8.4(1) from 8.2(1)

Connecting ASA 5520 to the ASA 5510...

 anyone else have this issue?

ASA 5520 VPN to 5510 PTP

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).