M12 running on Win7?

I'm having the same problem that an awful lot of people seem to be having - m12 installs just fin on a Win7 64-bit machine, but the program won't actually run.  I installed .Net 1.1 and MsXML directly from the CD.

I've tried running in Compatibility Mode for XP SP2, XP SP3, Vista, and Vista SP2 - all with the same result.  The UAC warning pops up, the process starts but then abruptly terminates.

Has anyone solved this problem or have any troubleshooting hints?

The following event log entry is the only hint I've got at the moment

Log Name:      Application

Source:        Windows Error Reporting

Date:          1/23/2012 1:33:21 PM

Event ID:      1001

Task Category: None

Level:         Information

Keywords:      Classic

User:          N/A

Computer:      XXXXXXXXXXXXXXXXX

Description:

Fault bucket , type 0

Event Name: PCA2

Response: Not available

Cab Id: 0

Problem signature:

P1: mcad.exe

P2: 12.1.3.0

P3: Mathcad 11

P4: Mathcad 11

P5: Mathsoft Engineering & Education, Inc.

P6: 200

P7: -1

P8:

P9:

P10:

Attached files:

C:\Users\jc\AppData\Local\Temp\{b0df6c6d-0482-47a6-acc4-3abfec883fc1}\appcompat.txt

C:\Users\jc\AppData\Local\Temp\TabAEA.tmp

These files may be available here:

Analysis symbol:

Rechecking for solution: 0

Report Id: 1b031096-45f9-11e1-87a6-2c27d744edb2

Report Status: 0

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Windows Error Reporting" />

    <EventID Qualifiers="0">1001</EventID>

    <Level>4</Level>

    <Task>0</Task>

    <Keywords>0x80000000000000</Keywords>

    <TimeCreated SystemTime="2012-01-23T19:33:21.000000000Z" />

    <EventRecordID>2759</EventRecordID>

    <Channel>Application</Channel>

    <Computer>XXXXXXX</Computer>

    <Security />

  </System>

  <EventData>

    <Data>

    </Data>

    <Data>0</Data>

    <Data>PCA2</Data>

    <Data>Not available</Data>

    <Data>0</Data>

    <Data>mcad.exe</Data>

    <Data>12.1.3.0</Data>

    <Data>Mathcad 11</Data>

    <Data>Mathcad 11</Data>

    <Data>Mathsoft Engineering &amp; Education, Inc.</Data>

    <Data>200</Data>

    <Data>-1</Data>

    <Data>

    </Data>

    <Data>

    </Data>

    <Data>

    </Data>

    <Data>

C:\Users\jc\AppData\Local\Temp\{b0df6c6d-0482-47a6-acc4-3abfec883fc1}\appcompat.txt

C:\Users\jc\AppData\Local\Temp\TabAEA.tmp</Data>

    <Data>

    </Data>

    <Data>

    </Data>

    <Data>0</Data>

    <Data>1b031096-45f9-11e1-87a6-2c27d744edb2</Data>

    <Data>0</Data>

  </EventData>

</Event>