problem with fmt:message tag

[Sonu Kaur]

Hi
I'm facing a problem with a jsp page
i have a property file
in which
i have defined some keys for the messages on the jsp
eg
text.equipment_comparative_features=comparative features

and i have created an interface OSAppConstants.java
into which ihave

public staic final String EQUIPMENT_COMPARATIVE_FEATURES="
text.equipment_comparative_features";

now in the jsp i'm importingn this java interface

and if i use the following

<fmt:bundle basename ='ApplicationResources' >
<fmt:message key= '<%=OSAppConstants.EQUIPMENT_COMPARATIVE_FEATURES%>' />
</fmt:bundle>


i get ??? displayed on th e page
where as if i use

<fmt:bundle basename ='ApplicationResources' >
<fmt:message key= 'text.equipment_comparative_features' />
</fmt:bundle>

i get the comparative features displayed


what cud be the reason
can anybody help plz
thanks