probleme propel

[symfony]

bonsoir

J essaye de mettre a jour mon model avec propel-build-model et j
obtiens ce message:

propel > om-template:
[propel-om] Target database type: mysql
[propel-om] Target package: lib.model
[propel-om] Using template path: C:\wamp\www\symfony\lib\vendor\propel-
generator\templates
[propel-om] Output directory: C:\wamp\www\superpiloteV2
[propel-om] Processing: generated-schema.xml
[propel-om] Could not perform XLST transformation. Make sure PHP has
been compiled/configured to support XSLT.
[propel-om] Processing: generated-sfGuardPlugin-schema.xml
[propel-om] Could not perform XLST transformation. Make sure PHP has
been compiled/configured to support XSLT.
[propel-om] Processing: generated-sfGuardPlugin-sfGuardPlugin-
schema.xml
[propel-om] Could not perform XLST transformation. Make sure PHP has
been compiled/configured to support XSLT.
[propel-om] Processing: schema.xml
[propel-om] Could not perform XLST transformation. Make sure PHP has
been compiled/configured to support XSLT.
Execution of target "om-template" failed for the following reason: C:
\wamp\www\symfony\lib\vendor\propel-generator\build-propel.xml:470:1:
Duplicate table found
: propel.
[phingcall] C:\wamp\www\symfony\lib\vendor\propel-generator\build-
propel.xml:470:1: Duplicate table found: propel.

BUILD FINISHED

Total time: 0.8868 seconds
>> file- C:\wamp\www\superpiloteV2\confi...Plugin-sfGuardPlugin-schema.xml
>> file- C:\wamp\www\superpiloteV2\confi...erated-sfGuardPlugin-schema.xml
>> file- C:\wamp\www\superpiloteV2\config\generated-schema.xml

mon model ne se met pas a jour quelqu un sait pourquoi?
Merci