Hey man, great plugin and I am using it with Gringotts.
I had Iconomy put I took that out, to try and figure out the issue.

You cannot do /t deposit after the Bank reaches 99

It says You don't have that much.

But I do.... I do have that much. Please help

I'm not quite clear what the problem is. Can you provide some example screenshots?

I use Gringotts, and with that I use Silver Coins from the Lord of the Rings. The penny is 1 Monies, The Dime is 10 Monies, and the Dollar Coin is 100 Monies.

If I do /t deposit 1-99 it will be fine, but if I try to do /t deposit 100, it will say [Towny] You don't have that much.

I can add any amount, until the bank reaches 99

Using /t The bank says 99, and I cannot add anymore, because is says [Towny] You don't have that much.

HELP pleeeeease I give a donut for helps

Have you created a vault for the town?

No.... how do I do that

Please read the documentation.