Wizard upgrade of VB 6 MSComm control to VB.net

[stacy]

I used the wizard to upgrade an application from VB 6 to VB.net, the
following warnings appear around the .Input method of the MSCOmm
control
'UPGRADE_WARNING: Couldn't resolve default property of object
MSComm1.Input. Click for more:
'ms-help://MS.VSCC.2003/commoner/redir/redirect.htm?keyword="vbup1037"'

When running the application, the following dialog comes up when a
character is written to the .Output method
"An unhandled exception of type
'System.Runtime.InteropServices.COMException' occurred in
axinterop.mscommlib.dll

Additional information: Exception from HRESULT: 0x800A017C
(CTL_E_INVALIDPROPERTYVALUE).
Can anyone help? I've looked at the documentation and can't make sense
of what is causing this problem. Everything I've read indicates that
if VB6 and .Net are both present (which they are) I should be able to
use the old control.

One thing that may be important is the changes made to the VB code:
Output:
VB6 code: BootStrap.MSComm1.Output = Chr(128)
VB.Net code: BootStrap.DefInstance.MSComm1.Output = Chr(128)

Input:
VB6 code: Dim Rx() as Byte
Rx = BootStrap.MSComm1.Input
VB.net code: Dim Rx() as Byte
Rx = BootStrap.DefInstance.MSComm1.Input