Support for TFTP protocol, problems

[Peter]

Hi,
I develop application filter.
One of protocols I'd like to include into my filter is TFTP.

Bug in ISA 2006:
I tried on ISA Server 2006, I add rule with action "Allow" and chose TFTP
protocol,
but there is some bug with it, because default rule denies it (info from log).
In TMG, TFTP rule is functional.

I have question:
I tried to call InstallFilter() on TMG with included TFTP_PROTOCOL_GUID_BIN,
but when I try to download file through TFTP, no event is fired in
FirewallEventHandler().

Does TMG (ISA) support this ?
I'd like to have data stream of TFTP data, similarly like in other protocols
which I can filter by this way, for example HTTP, IMAP, POP3, SMTP.

Thanks !
Peter