Here are some things that have helped clear up crashes for me in the past:
Try emptying the cache folder (Ryzom\cache).
If that doesn't work, try renaming client.cfg (Ryzom\client.cfg)
If that doesn't work, run ryzom_configuration_rd.exe (Ryzom\ryzom_configuration_rd.exe) and click the Default button.
Try emptying the cache folder (Ryzom\cache).
If that doesn't work, try renaming client.cfg (Ryzom\client.cfg)
If that doesn't work, run ryzom_configuration_rd.exe (Ryzom\ryzom_configuration_rd.exe) and click the Default button.
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Eldest, Order of the White Lotus