Public key for wxBase-2.8.12-1.el5.i386.rpm is not installed for pg_admin3

I am trying to install pgadmin3_91.i386 0:1.16.0-1.rhel5 on a centos 5.7
Currently installed license keys are:
RPM-GPG-KEY-beta RPM-GPG-KEY-EPEL RPM-GPG-KEY-PGDG
RPM-GPG-KEY-CentOS-5 RPM-GPG-KEY-linux-ink RPM-GPG-KEY-PGDG-91

Postgresql version installed is 9.1, not the default 8.4
postgresql91.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-contrib.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-debuginfo.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-devel.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-docs.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-libs.x86_64 9.1.6-1PGDG.rhel5 installed
postgresql91-odbc.x86_64 09.00.0310-1PGDG.rhel5 installed
postgresql91-server.x86_64 9.1.6-1PGDG.rhel5 installed

when trying to install pg_admin3 I get the following

Dependencies Resolved

================================================================================
Package Arch Version
Repository Size
================================================================================
Installing:
wxBase i386 2.8.12-1.el5 pgdg91
696 k

Transaction Summary
================================================================================
Install 1 Package(s)
Upgrade 0 Package(s)

Total size: 696 k
Is this ok [y/N]: y
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID
217521f6
pgdg91/gpgkey | 1.7 kB 00:00

Public key for wxBase-2.8.12-1.el5.i386.rpm is not installed
Trying to just install wxbase has the same outcome

I cant find where the public key is and I think my problems are due to
pgdg91/gpgkey. Somewhat confused here
Any help would be greatly appreciated.