Hey all, ran into a problem last night with the ILS Z approach into RWY 6 at LIPQ / TRS. Approach plate is attached.

I hit the holding pattern at LEIRA at 2200’, established on the localizer and picked up the GS. Horizontal navigation was working no problem, but vertically I had no movement and had to do a missed approach. Came in for a second approach, established a bit farther out before LEIRA and this time dropped to 1800’ before activating the approach. Again I picked up the localizer, got the GS notification, but the aircraft again didn’t descend on the GS. Ended up doing a missed approach and manually landing after coming around again.

This was my first time flying into LIPQ and I’m wondering if there’s anything I missed with this approach as far as activating the GS? Planning on running thru a couple approaches later with FSpanel to troubleshoot but figured I’d ask if there’s anything blatant I might be missing.

Thanks!