Sherry34,
Well, I exactly don't know the actual situation in which you are doing research project in Poland. There may be one of the following situations applicable in your case:
1. You are financially supported by your employer for this research project and you must be on paid leave therefore your salary is being transferred to your account on monthly/quarterly/whatever basis.
2. You are not financially supported by your employer for this research project but your employer approved paid leave to conduct this research project therefore your salary is being transferred to your account on monthly/quarterly/whatever basis. You have scholarship to conduct this research project or your family is financially supporting you to conduct this research project.
3. You are not financially supported by your employer for this research project and your employer also didn't approve paid leave to conduct this research project therefore your salary is not being transferred to your account. You have scholarship to conduct this research project and your living expenses or your family is financially supporting you to conduct this research project and your living expenses.
In any of above cases, your should update LVO with supporting documents in order to avoid any complications at later stage especially if you situation matches to case number 3 above because LVO may you 3 or 6 month bank statement or recent salary slips from your current employer, and if you wouldn't have updated the LVO, then you may fall in trouble.
This is my opinion; rest is your decision.
:-*
