i have i get xml code from post

if i have this code:
<netdirect version="4.1.11"><approval>yes</approval><amount>3.00</amount><trans_id>173413403335228</trans_id><error>none</error><fee>0.71</fee><time>{ts'2014-10-15 20:02:13'}</time><firstname>EURFirstname</firstname><lastname>EURLastname</lastname><account_id>453501020503</account_id><email>netellertest_eur@neteller.com</email><custom_1 xsi:nil="true"/><custom_2 xsi:nil="true"/><custom_3 xsi:nil="true"/><total_fee>0.71</total_fee><client_currency>EUR</client_currency><client_amount>3.00</client_amount><merchant_currency>EUR</merchant_currency><merchant_amount>3.00</merchant_amount><fxrate>1.00000000</fxrate></netdirect> how can i use redirect isok.aspx if is appr ...