WorkList Item link missing server name in URL

Hi, could someone please help me on this one I've tried troubleshooting for some time but I've found no solution.

When I use the following code to create a process instance in the code behind of a webform, the worklist item's link in my workspace shows up as http://K2Employee/HR2.aspx?sn=PIERRE,42,25, instead of
http://localhost/K2Employee/HR2.aspx?sn=PIERRE,42,25.

Basically it is missing the localhost part so when I click on the worklist item to view its details, an "action cancelled" error appears in the right pane because the url is wrong.

Here is the code in question I use to start the process:

SourceCode.K2ROM.Connection oK2Connection = new SourceCode.K2ROM.Connection();

SourceCode.K2ROM.ProcessInstance oNewProcessInstance;
oK2Connection.Open("localhost");
oNewProcessInstance = oK2Connection.CreateProcessInstance("HRNewEmployee");
oK2Connection.StartProcessInstance(oNewProcessInstance, true);
oNewProcessInstance.Update();

Iv'e added an image of the worklist item screen to help in understanding the problem.

Any ideas are greatly appreciated,

Thanks!