Running SQL Server Stored Procedures Through Access

Hi,
Can someone help me with this problem.
I have a stored procedure in SQL Server that updates a particular table. When I run it in SQL server Query Analyser, it works fine. But I want to invoke this stored procedure when I click a button on an MS Access Form. The code I'm using is:

Dim cn, cmd
Set cn = CreateObject("ADODB.Connection")
cn.Open "SQL" //Data Source Name
Set cmd = CreateObject("ADODB.Command")
Set cmd.ActiveConnection = cn
cmd.CommandText = "LoadApplicants" //Stored Procedure Name
cmd.CommandType = adCmdStoredProc
cmd.Execute

for some reason only a few records are updated everytime I click on the button. Is there any reason why this is happening?