I also continue the contract by the domestic helper, i remember she go to immigration dept. & consulate before 1 month.
I think you had better to ask your domestic helper to return the signed contract to immi. & consulate on or before 1 March 2011 as immi. need to re-issue the working visa to the domestic helper.
I have renewed the DH contract with my Phi helper recently. The progress is as follows:
1) Submited the signed contract (green standard contract) on 14/02/11 (mon) for attestation, costed $297.50; and paid $196 for OWWA membership (not sure what's it, I bear the fee).
Documents required: original & copy of old contract + original signed new contract + employer's HKID copy + helper's original & copy of passport & HKID.
2) Collected the attested contract from Phi Consulate yesterday, 21/02/11 (one week's time) and submit the contract and immigration forms to Immigration and got the visa issued on the same day (yesterday). Visa fee $160. I made the appointment booking online in advance.
Documents required: signed & attested contract + ID998A + ID998B (leave open for levy part) + helper's original pp & hkid.