Is'nt naval units supose to be upgradable?

[Hybrid2]

i'm playing the Rise and Rule scenario,on Civ3conquest.
and I cant upgrade the naval units. is that normal?

I had problems since i had to reinstal the game.

game crach because of missing files like Musketee and knigntdeath and archer.

I remouved and reinstald the gam ans patch twise.

I still got the musqueteer and knight crash.
that i found out how to fix here. Thank you.

I though the conquest patch was supose to fix those?

Help!

 

[Turner]

In RnR, you need a shipyard to upgrade.

 

[Hybrid2]

oh thank you.