error econnect 10 "The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value"

Hi partners, i am developing a integration application with econnect 10 in GP but i get the next error "The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value" please help me!!! ....
<taBRBankTransactionHeader>
<Option>1</Option>
<CHEKBKID>MICHEQUERA</CHEKBKID​>
<TRXDATE>17/07/2011</TRXDATE>
<CMTrxNum>00000056</CMTrxNum>
...