How do i get on from here?

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checking for GNOME_KEYRING... no
checking for GNOME_KEYRING... no
checking for GNOME... configure: error: Package requirements (gtkmm-2.4 >= 2.12) were not met:

Requested 'gtkmm-2.4 >= 2.12' but version of gtkmm is 2.10.9

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GNOME_CFLAGS
and GNOME_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

I'm trying to create a VNC connection from a Windows 7 client to a CentOS 5.x
The connection is closed immediately when i create the connection.

I have followed these instructions.
http://wiki.centos.org/HowTos/VNC-Server

In the Puty configutration i have tried with source 5801, target url:5801
and source 5901, target url:5901

Connection directly to the server works but then the connection is not secure. But it proves that there is no firewall or other network issues.

TightVNC quits with "Connection has been gracefully closed"
RealVNC says "The connection closed unexpectedly"

Do i need to install the TightVNC server in order to use the TightVNC client?