when I try to use scr-nat NAT rule, only periodicaly does it allow traffic through. src-nat Masquerade works, but I need to have differnt IP's comming out othe the 2nd interface.

This is how my scr-nat NAT rule was setup

scr-address=192.168.1.3/32 action=nat to-dst-address=196.245.10.3

now only at random for no reason at all when the pc's tries to establish a connection, only afew bytes per min might go through.

but when its was setup to masquerade then its worked fine.

Any Ideas.

you have a mistake in your rule, it should be to-src not to-dst

sorry my mistake, it is src-address to-src-address. Only sometimes it get data through