Loadrunner Regular Expression

I am trying to fetch the value from a dynamic boundary. source code and snippet given below.

name="pvUnitPriceInclTax242" type="text" value="30.0000"

web_reg_save_param_ex("ParamName=pvUnitPriceInclTaxValue",
"RegExp=name=\"pvUnitPriceInclTax[0-9]+\" type=\"text\" value=\"([0-9]+\.[0-9]+)\"",
LAST);

I have checked above regular expression here and its working fine. But it gives following error while running in Loadrunner.

The "RegExp=name="pvUnitPriceInclTax[0-9]+" type="text" value="([0-9]+.[0-9]+)"" argument (number 2) is unrecognized or misplaced    

since Loadrunner uses PCRE, i have no idea why its happening. Somebody please help me to solve this.