GPS11858 current

Hi, I have buy this Eval Boards GPS11858.

I link the pin :

pin——>input/output

VCC—->power 3.3V

GND—->power ground

TXA—–>RS232RX

RXA—–>RS232TX

It will return message, but without the GPS data.

the message likes “$GPRMC,V,10”

and the sv health always zero (I test the module on roof)

Any pin I lost?