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  <td class="tr-caption" style="text-align: center;">
    backtrack 5 startx error
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Steps to fix this kind of error

 [a] /root/.kde/cache-bt  
 [b] /root/.kde/cache-root  
 Type the following find commands to find and delete .kcache files:  
 # cd /root/.kde/  
 # find . -type f -iname "*.kcache" -delete  
 Type the following command to start KDE desktop:  
 # startx  

GNOME USERS :
steps :

 fix-splash  
 rm /root/.kde/cache-root/icon-cac­he.kcache  
 rm /root/.kde/cache-root/plasma_t­heme_Volatile.kcache  
 rm /root/.kde/cache-bt/icon-cache­.kcache  
 rm /root/.kde/cache-bt/plasma_the­me_Volatile.kcache  

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FOR INSTALLATION
http://www.computersnyou.com/2011/05/how-to-install-backtrack-5-in-vmware.html

reference