Scott H. Lindsey-Stevens, N3ASA says:
Please note that prior to the Saint-Mard, France school contact the packet station will be switched off to avoid any possible interference to the QSO. The astronauts should switch the packet station back on after the contact. However, the switch over will most likely not be immediate.
So please be patient if packet service does not immediately resume.

Thank you & 73,
Scott H. Lindsey-Stevens / N3ASA
ARISS-US Public Relations Representative

Copied this info from the SAREX bulletin board.

The ARISS team is pleased to announce that the next school contact with the International Space Station astronauts will take place Thursday, 1 April between the ISS crew and students at the “College Georges Brassens of Saint Mard" and the “Jacques Prevert" school. The contact
is scheduled to bring about 1827 UTC or 2027 local daylight time.