blt error compiling swarm

[Omar Armas]

i have redhat 5.1 and compiled libraries succesfully, but when i run configure 
of  swarm i get an error. i ran ldconfig and i have /usr/lib in /etc/ld.so.conf.

this is the error i get:

checking directory of libBLT.a... no
configure: error: Please use --with-bltdir to specify location of BLT package

but the library is there 

address@hidden swarm-1.2]# ls /usr/lib/libBLT.a
/usr/lib/libBLT.a

this is how i use configure:

./configure --with-bltdir="/usr/lib/" --with-tclobjcincludedir="/usr/include"

any idea about what's the problem?

thanks

omar