using preauthentication in SoapConnection

We have the code below. When it runs form A simple PB client (a button) preauthentication is working. When it runs from EAServer it does not. Any ideas?

Powerbuilder 12.5.2 build 5609

Long ll_ret

SoapConnection conn

currencyConvertor currencyConvertorProxy

Conn = CREATE SoapConnection

ll_ret = conn.enablepreauthentication( )

ll_ret = conn.setbasicauthentication("", "user", "password")

ll_ret = conn.createinstance( currencyConvertorProxy, "currencyConvertor", "http://www.webservicex.net/CurrencyConvertor.asmx?WSDL")

double ld_rate

ld_rate =  currencyConvertorProxy.conversionrate(1.4,2.5)

destroy conn

destroy currencyConvertorProxy