Runtime Access 2007

Hi !
Could you pllease help me as I installed Runtime for Acces 2007 on some Pcs in my company. When I try to enter new data using runtime it won't let me adding new record in the subform stating that the Master Link Fields Property setting has produced this error: A problem occured when the DataBase (Name) was communicating with OLE or Activex Control.....

Could you tell me what shall I do??


Also It doesn't want to generate calculations applied on Purchase order form(i.e. When I enter rate which then calculates VAT and final amount according to qty it won't do it stating that error occured in record) :o( I feel very very dissapointed ..