[OpenLayers-Users] geoext geoserver and Proxy use

[islanis at infomed.sld.cu]

Hi people, this is my problem, am using Geoserver 2.1.2 and its proxy  
plugin, but all is fine with my openlayers codes, including openlayer  
througt the proxy using

OpenLayers.ProxyHost = "/geoserver/rest/proxy?url=";

but when i try to print with the geoserver plugin, i fotgot that i use  
a POST transaction but i dont know how i put de username and the  
password, this is my code of my print provider


printProvider = new GeoExt.data.PrintProvider({
    method : "POST", // "POST" recommended for production use
    capabilities : printCapabilities, 	// from the info.json script in the html
    customParams : {
       mapTitle : "Biomasa Biogas",
       comment : "Estudios"// comentario
    }
});

thanks

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