To prevent spam and flood, the restrictions are imposed to the chat.
To make it possible for you to write to the chat, your balance should be not less than 100$ or equivalent in the other currencies.

How we count:

1 RUR -> 0.03 USD
1 EUR -> 1.2 USD
1 BTC -> price of pair BTC/USD
1 LTC -> price of pair LTC/USD
1 NMC -> price of pair NMC/USD
1 NVC -> price of pair NVC/USD
1 PPC -> price of pair PPC/BTC multiplied by price of pair BTC/USD
1 FTC -> price of pair FTC/BTC multiplied by price of pair BTC/USD
1 XPM -> price of pair XPM/BTC multiplied by price of pair BTC/USD

Open orders are not considered. To be able to write to the chat, you should have not less than 100$ exactly in your balance.

You may check how much USD do you have out here: https://btc-e.com/calc