XSL and WML using servlets

Hi
I am stuck with xsl for wml.I cannot get to see my wml page in any mobile emulator.However I was able to see it in some WAP browsers like winwap etc..
What could be wrong with xsl?I am actually generating wml from xml and xsl passed on to the transformer class in servlet .This works fine for wap browser like winwap but not for any emulators like erricsson,nokia etc..
Please help
Thanks

Actually I am setting header (i.e PUBLIC //WAPFORUM etc)from servlet hence not mentioned here in XSL file.
In servlet:
static void getWmlHeader(java.io.PrintWriter out)
{       out.println("<?xml version=\"1.0\"?>");
     out.println("<!DOCTYPE wml " +
     "PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\"");
     out.println ("\"http://www.wapforum.org/DTD/wml_1.1.xml\">");
XSL File:
<?xml version="1.0"?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
<xsl:variable name="customer_Id" select="customerInfo/customer/CUSTOMER_ID"/>
<xsl:variable name="product" select="customerInfo/customer/PRODUCT"/>
<wml>
<card id="S3" title="Product Page">
<p align="center">
*<b>Login Successful</b>*
customer Name :<b><xsl:value-of select="customerInfo/customer/CUSTOMER_NAME"/></b>
customer Id :<b><xsl:value-of select="customerInfo/customer/CUSTOMER_ID"/></b>
Item :<b><xsl:value-of select="customerInfo/customer/PRODUCT_ITEM"/></b>
Proceed to register
<a href="/ProductIndex/ItemList?cid={$customer_Id&product={$product">Select Items</a><br/>
<a href="/ProductIndex/Index">HomePage</a><br/>
</p>
</card>
</wml>
</xsl:template>
</xsl:stylesheet>
Thanks
Ash

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