case STB0899_FEC_1_2:           /* 13   */
                        STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 0x1a);
                        stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       reg = 0;
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_2_3:           /* 18   */
                        STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 44);
                        stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       reg = 0;
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_3_4:           /* 21   */
                        STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60);
                        stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       reg = 0;
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_5_6:           /* 24   */
                        STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 75);
                        stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       reg = 0;
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_7_8:           /* 26   */
                        STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 94);
                        stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       reg = 0;
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;