Boycotting between brothers

After the death of my father, there ensued a financial disagreement between me and my brother; this disagreement has [now] continued [between us] for [many] years. So, I sought refuge [in Allaah] from Shaytaan the accursed, and began to telephone him and show kindness to him, but he does not reciprocate. I [also] began to visit him with my children to initiate an air of politeness [between us], but he does not let us in[to his house]. So what should my position [now] be [towards my brother], as I feel pain [at our deteriorating state of affairs] O noble Shaykh, since my father and mother have [both] passed away?

Youth afflicted with committing a sin

I am a youth, and have been afflicted with [committing] a sin, and every time I repent [to Allaah] from it, I go back to doing it; I [just] want to be free of it, [so] if I were to do it again, is it permissible for me to undertake an oath that I shall fast a day for the Sake of Allaah, or give in charity so [as a result of which] He will safeguard me from doing it again?