O Mother of God, Immaculate Mary, to thee do I dedicate my body and soul, all my prayers and deeds, my joys and sufferings, all that I am an all that I have. With a joyful heart I surrender myself to thy love. To thee will I devote my services of my own free will for the salvation of mankind, and for the help of the Holy Church whose Mother thou art.
From now on my only desire is to do all things with thee, through thee, and for thee. I know I can accomplish nothing by my own strength, whereas thou can do everything that is the will of thy Son, Our Lord Jesus Christ. Thou are always victorious. Grant, therefore, O Helper of the Faithful, that my family, my parish, and my country might become in truth the Kingdom where thou reignest in the glorious presence God the Father, God the Son, and God the Holy Spirit, forever and ever. Amen. [http://www.marypages.com/PrayerstoMary.htm]
Tell us how Catholics understand those words different then would be normal. Tell us how that is only asking Mary to pray for you. Tell us that is not replacing Christ with Mary.
It is contained in that very prayer...
“whereas thou can do everything THAT IS THE WILL OF THY SON”
This alone is enough to know that the one who prays this is not treating Mary as a Divine Person. She does nothing on her own, but only in accord with the Father, Son, and Holy Spirit. You have no argument.
If only more people were to pray this every day, the world would be a better place.