why is my richfaces showing without css? - css

Question

I'm trying to add a richfaces calendar to an already running jsf internal website.
the calendar is not showing as it is in the demo, and after searching I found that this file: http://localhost:8080/abcd/faces/a4j/s/3_3_3.Finalorg/richfaces/renderkit/html/css/basic_both.xcss/DATB/eAF7sqpgb-jyGdIAFrMEaw__ is not being loaded (0 size).
I'm not sure what is the problem. I'm assuming its a sort of conflict but I can't put my hand on it at the moment.
any thoughts/ideas on how to solve this?
P.S. my web.xml has the following lines:
<context-param>
<param-name>org.richfaces.SKIN</param-name>
<param-value>blueSky</param-value>
</context-param>
<context-param>
<param-name>org.richfaces.CONTROL_SKINNING</param-name>
<param-value>enable</param-value>
</context-param>
<context-param>
<param-name>org.richfaces.LoadScriptStrategy</param-name>
<param-value>ALL</param-value>
</context-param>
<filter>
<display-name>RichFaces Filter</display-name>
<filter-name>richfaces</filter-name>
<filter-class>org.ajax4jsf.Filter</filter-class>
</filter>
<filter-mapping>
<filter-name>richfaces</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>