Leaking roof just above windscreen???

Hi,

My Freelander has recently started getting a very wet patch on the material on the roof just above the windscreen (where the passenger visor is) when it rains.

I think this is something to do with the roof bars, because where the roof bar attachment ends, there may be water leaking in through the small gap.

Has anyone got any info on this at all or has this happened to anybody else?

Feedback would be much appreciated

Thanks

most probably the roof bars, think its been covered before if you search