Neoteris SSL VPN Slowness

Does anyone have any suggestions or experience regarding slowness issues
with a Neoteris SSL VPN connection?

Connections to OWA and Citrix are noticeably slower through the Neoteris
device, almost to an unacceptable rate, and this is before an in
production roll-out. The original Neoteris connection was through a
firewall to a single port on the Neoteris. It has since been adjusted to
placing one port on the DMZ and one internal to no effect.

Internet is provided by two T1's with outbound traffic on one and
inbound on the other. I-net does not appear to be an issue, as direct
connections to either app function fine. Firewall is a Netscreen-50,
thus there should not be a latency issue with it.

Any ideas or real world experience with this product is welcome.

Thanks,

--Dante