GWT 1.4.10: problem running application

Hello,

Am stuck up in a weird problem with GWT application execution. The following is the stack trace:

[ERROR] Failed to create an instance of 'com.labinal.client.Conteneur' via deferred binding 

com.google.gwt.dev.shell.HostedModeException: invokeNativeString(@com.google.gwt.user.client.impl.DOMImpl::getElementProperty(Lcom/google/gwt/user/client/Element;Ljava/lang/String;)): JavaScript undefined, expected java.lang.String

at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:101)

at com.google.gwt.dev.shell.ModuleSpace.invokeNativeString(ModuleSpace.java:264)

at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeString(JavaScriptHost.java:129)

at com.google.gwt.user.client.impl.DOMImpl.getElementProperty(DOMImpl.java:194)

at com.google.gwt.user.client.DOM.getElementProperty(DOM.java:699)

at com.google.gwt.user.client.ui.UIObject.ensurePrimaryStyleName(UIObject.java:195)

at com.google.gwt.user.client.ui.UIObject.resetStyleName(UIObject.java:119)

at com.google.gwt.user.client.ui.UIObject.setStyleName(UIObject.java:474)

at com.labinal.client.ihm.PageLogin.setOrientation(PageLogin.java:179)

at com.labinal.client.ihm.PageLogin.<init>(PageLogin.java:58)

at com.labinal.client.ihm.PageLogin.getInstance(PageLogin.java:169)

at com.labinal.client.Conteneur.<init>(Conteneur.java:143).

I use the following:

Eclipse JUNO

JRE 1.5.20

Apache Tomcat 5.0.28

Please post me some help..

Thanks 

Nandita

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