Hello centrefemmes, sorry you’re having this issue!
I think I may have a solution, if you could try these steps:
- Make sure all other plugins are deactivated
- Switch to a standard theme like Twenty Twelve
- Manually flush your permalinks, by resaving them in WP-Admin > Settings > Permalinks
If that fixes your problem, go ahead and reactivate your theme, and then you plugins. If the problem comes back after turning everything on again, there may be a conflict.
Does this make sense? Let me know how it turns out!
Cheers!
– Casey Driscoll