I have just joined e bay. When I want to make a bid it asks me to "enter valid number" what does this mean?

[bigh2012_2012]

I have just joined e bay. When I try to make a bid it asks me to "enter valid number" as well as the bid amount. What is this valid number?

[mellamomanue]

ezte pa quescribe azi, con lo facil ques ponerlo en castellano.

Poz tu problem ez que ponez coma en lugar de punto, you anderstan? poz eso

1.000 ok

1,000 not good 

mabra entendio?:|