No Response from Raw Soap Message

[Jon]

I have been working with raw soap messages rather than a proxy client as this is much quicker in .Net and I have much more finer control over the message and response. I get a Soap Encoding Fault when sending a request to GetMerchant, here's the body of my message:

<SOAP-ENV:Body>
<m:getMerchant xmlns:m="http://api.productserve.com/">
<m:aMerchantIds xsi:type="SOAP-ENC:Array">
<m:aMerchantIds>0</m:aMerchantIds>
</m:aMerchantIds>
</m:getMerchant>
</SOAP-ENV:Body>

Note: I'm trying to return all merchants rather than a specific one .... is this possible?

Thanks in advance