I think the company means Soyuz-U and its Progress spacecraft but anyway Arianespace says
The 1743rd flight of a Soyuz launch vehicle was performed on Thursday, May 7, 2009 from the Baikonur Cosmodrome in Kazakhstan at 22:37 Moscow time (20:37 Paris time).
Arianespace and its Russian partners report that the Soyuz TMA-15 manned transport spacecraft was accurately placed on the target orbit for another mission to the International Space Station. This was the fourth Soyuz family mission in 2009.