Problem of communication between visual basic 6.0 and PIC16F877A by using RN41

Hi.....

I am doing a project that need to sent and received signal from Computer to PIC and i using RN41 to be my wireless connection.Unfrotunely, i meet a problem, when i success to connect the RN41 with my computer (which mean turn the red LED to Green LED) I unable to sent any data out.

The following is my VB doing


Visual Basic Coding
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Private Sub Command2_Click()
MSComm1.Output = "a"
End Sub



Private Sub Command3_Click()
If Combo1.Text = "" Then
MsgBox "Please select the Port to open"
Else
If Command3.Caption = "Open" Then
MSComm1.CommPort = Combo1.Text
MSComm1.PortOpen = True
Command3.Caption = "Close"
Frame3.Enabled = True
Else
MSComm1.PortOpen = False
Command3.Caption = "Open"
Frame3.Enabled = False
End If
End If
End Sub



Private Sub MSComm1_OnComm()

Dim data As String
If MSComm1.CommEvent = comEvReceive Then
data = MSComm1.Input

If data = "X" Then
Text1.Text = ""
ElseIf data = "Z"

Else
Text1.Text = Text1.Text & data
End If

MSComm1.RThreshold = 0
MSComm1.InputLen = 0
End If
MSComm1.RThreshold = 1
MSComm1.InputLen = 1

End Sub
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May i know is it my coding got any problem so i not able to sent data out??

Anyone any idea please tell me......
Thanks for advance.

For additional, anyone can contact me with my personal email as well.
reeve333@yahoo.com