NEED HELP---cant trade

[gumbi91]

i really need help with trading....i am succeeding at everything else but i cant trade my luxuries (7 extra sources of gems) I have already..........
- my capital is connected to theirs
- my trade advisor advises me to trade
- their luxuries appear on the diplomacy screen but mine do not
- i have roads to my sources
- I have embassies with the country

When i get to the diplomacy screen, their luxuries are available but mine are not, just my resources (which i dont have extra of)

This is a major roadblock and all the manuals and walkthroughs dont seem to cover this sort of problem

thanks

[buster]

The only reason I an imagine is that they already have gems in which case they wont be interested. You can only trade items which they themselves lack.