Intergrating with Protx VSP Direct

[bodar77]

I was hoping that someone can help me with a problem. I am trying to link my

web-site to the Protx payment system using VB.NET and Protx's VSP DIRECT. I

have downloaded the .Net kit that protx supply and have referenced the

protx.vb.dll and imported protx on my checkout.aspx.vb

when I click submit to send the relevent details as a string

I get this error.

 

Server Error in '/' Application.

 

Object reference not set to an instance of an object.

 

Description: An unhandled exception occurred during the execution of the

current web request. Please review the stack trace for more information

about the error and where it originated in the code.

 

Exception Details: System.NullReferenceException: Object reference not

set to an instance of an object.

 

Source Error:

 

An unhandled exception was generated during the execution of the current

web request. Information regarding the origin and location of the

exception can be identified using the exception stack trace below.

 

Stack Trace:

 

[NullReferenceException: Object reference not set to an instance of an

object.]

Protx.Vsp.VspTransaction..ctor(String version, VspServiceType

serviceType, VspTransactionType txType, String vendorTxCode) +75

Protx.Vsp.DirectTransaction..ctor(String vendorTxCode,

VspTransactionType txType) +25

e_productdirect.Checkout.placeOrderButton_Click(Ob ject sender,

EventArgs e) in C:\e-productdirect\Checkout.aspx.vb:188

System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108

System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.Rai

sePostBackEvent(String eventArgument) +57

System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler

sourceControl, String eventArgument) +18

System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData)

+33

System.Web.UI.Page.ProcessRequestMain() +1292

 

Version Information: Microsoft .NET Framework Version:1.1.4322.2300;

ASP.NET Version:1.1.4322.2300

 

It refers to this line of code:

Dim tx As New Protx.Vsp.DirectTransaction(vendorTxCode,

Protx.Vsp.VspTransactionType.Payment)

 

Its really got me stumped can anyone help.