I can't use Sitemap when I use UrlMapping

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when I create folder for every page and remap those in web.config , appeared this problem .1)I can't see content of pages.2)When I use navigation controls , my web.SiteMap don't work and don't show path of pages. what is problem in my project , and what I solve that ?this link is my web site :Urlmapping code :\[code\]<urlMappings> <add url ="~/HOME" mappedUrl ="~/Default.aspx"/> <add url ="~/a" mappedUrl ="~/a.aspx" /> <add url ="~/a1" mappedUrl ="~/a1/a1.aspx"/> <add url ="~/a2" mappedUrl ="~/a2/a2.aspx"/> <add url ="~/b" mappedUrl ="~/b/b.aspx"/> <add url ="~/b1" mappedUrl ="~/b1/b1.aspx"/> <add url ="~/b2" mappedUrl ="~/b2/b2.aspx"/> <add url ="~/b3" mappedUrl ="~/b3/b3.aspx"/> <add url ="~/c" mappedUrl ="~/c/c.aspx"/> <add url ="~/c1" mappedUrl ="~/c1/c1.aspx"/> </urlMappings>\[/code\]SiteMap code : \[code\]<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" ><siteMapNode url="~/HOME" title="Home" description="Home Page"> <siteMapNode url="~/a" title="page a" description="page a"> <siteMapNode url="~/a1" title="page a-1" description="page 1 of a" /> <siteMapNode url="~/a2" title="page a-2" description="page 2 of a"/> </siteMapNode> <siteMapNode url="~/b" title="page b" description="page b"> <siteMapNode url="~/b1" title="page b-1" description="page 1 of b" imageTitle="lake"/> <siteMapNode url="~/b2" title="page b-2" description="page 2 of b" imageTitle="wolf"/> <siteMapNode url="~/b3" title="page b-3" description="page 3 of b" imageTitle="thunder"/> </siteMapNode> <siteMapNode url="~/c" title="page c" description="page c"> <siteMapNode url="~/c1" title="page c-1" description="page 1 of c"/> </siteMapNode></siteMapNode>\[/code\]