Fuel filter replacement problems Options

[Mangozac]

Hi guys,

Decided to replace my fuel filter today, seeing as I've had the car for 18 months and never done it (and who knows when it was last done before I bought it). Got a Valvoline replacement filter, as specified for an ST204R.
The old filter came off easily enough. Ended up with petrol everywhere but no drama
I put the new filter on and started her up but fuel was streaming out of the bottom (inlet) line. After a few goes of loosening and checking the thread and doing it back up as tight as possible without rounding the nut, it was still leaking!

I put the old filter back on and no leaks at all. I compared the two filters. The new one is a little bigger, but the ports are still identical so I can't see why there would be a problem! I did a search and read of a couple of people who seemed to have the same problem but no fixes.

Any suggestions? Any help would be really appreciated!

Zac