[shellfishgene]

First you need to find out if the problem is in the delivery, like voice, emotion or body language, or the actual content. There are people who have difficulty contributing things that have a point, or say things that "don't go anywhere".

This will be hard to find out on your own or asking online. Find a friend and try to get them to talk to you about this, this can be difficult, but if you try to make clear in a one on one conversation that you're suffering from this and you need their honest opinion, it would probably help.