I am trying to install Bluephone on Ubuntu 7.04

I get the following error

Checking for libgnomeui-2.0... Package libgnomeui-2.0 was not found in the pkg-config search path. Perhaps you should add the directory containing `libgnomeui-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'libgnomeui-2.0' found
configure: error: Library requirements (libgnomeui-2.0) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.

I used find

# find / -name "libgnomeui*" -print

but could not find libgnomeui-2.0

Could not install it vi apt-get

Please can you advise