Invocation of method 'getSpaces'

Hi, I have modify my navigation panel so that a user will see only space he has access rights. Now I have this error : Error number 4001 in 4: Error while parsing velocity page Panels.Navigation Wrapped Exception: Invocation of method 'getSpaces' in class com.xpn.xwiki.api.XWiki threw exception com.xpn.xwiki.XWikiException: Error number 3223 in 3: Exception while searching documents with sql select distinct doc.web from XWikiDocument doc Wrapped Exception: could not execute query @ Panels.Navigation6,23? Error number 4001 in 4: Error while parsing velocity page Panels.Navigation Wrapped Exception: Invocation of method 'getSpaces' in class com.xpn.xwiki.api.XWiki threw exception com.xpn.xwiki.XWikiException: Error number 3223 in 3: Exception while searching documents with sql select distinct doc.web from XWikiDocument doc Wrapped Exception: could not execute query @ Panels.Navigation6,23? com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while parsing velocity page Panels.Navigation Wrapped Exception: Invocation of method 'getSpaces' in class com.xpn.xwiki.api.XWiki threw exception com.xpn.xwiki.XWikiException: Error number 3223 in 3: Exception while searching documents with sql select distinct doc.web from XWikiDocument doc Wrapped Exception: could not execute query @ Panels.Navigation6,23? at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:148) at com.xpn.xwiki.render.XWikiVelocityRenderer.render(XWikiVelocityRenderer.java:91) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:229) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:161) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXWikiRenderingEngine.java:132) at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:362)...... Do you know what is the problem? Bye