Hi Mr.Vijay,
acoording to me the problem is with ejb-jar.xml file
only.
in it u didb'e mentioned the home,remote amd bean
class's names under <ejb-name> tag.
here i am giving the solution.

   <ejb-name>statelessSession</ejb-name>
   <home>(full path of home interface class file)    
</home>
   <remote>(same as above) </remote>
   <ejb-class>(path of bean class)</ejb-class>

try again after replacing the code.
all the best.
bye...
veeresh.k